Which of the following is a possible cost of using renewable resources?
a loss of animal species
b. land degradation
c. lower availability of freshwater
d. all of the above

i think that you are smart and you should fit for it out

cell division is not regulated in tumor cells.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

well, i believe that the answer is 2. : 3